Environmentally friendly elastic fillers have screened several high-quality varieties of polyolefins and polyamides with corrosion resistance, temperature resistance and aging resistance. They are mixed with additives such as hydrophilic, adsorption, and thermal oxygen resistance. Process, the thread is interspersed and fixed on the corrosion-resistant, high-strength center rope. Due to the excellent selection of materials and process formula, and the moderate rigidity and flexibility, the thread is uniformly arranged and radiated in a three-dimensional state, and the monomer of the suspended three-dimensional elastic filler is made. , the filler can be uniformly stretched and spread in all directions in the effective area, so that air, water and biofilm can be fully mixed and contacted and exchanged. The voids are variable, and it can obtain a larger and larger specific surface area during operation, and can carry out good metabolism. This feature and phenomenon is unmatched by other domestic fillers.